ActilinoOperation of the ActilinoPage 515.1.12.19 Battery charge enableIf this checkbox is not checked, the battery will not be charged via the USB interface of theconnected computer. This is helpful to save the battery of a laptop, if you are traveling anddo not have access to a power outlet. However, if the voltage of the Actilino's battery is lessthan 3.6 V, it will nevertheless be charged with minimum charge current (100 mA).Independent of this option's setting, the battery will be charged by the wall power supplyanytime with the maximum charge current.5.1.12.20 Low energy braille outputIf this function is activated, the power consumption of the Braille display is lower and theBraille pins hit a bit softer.5.1.12.21 Battery calibration: see manualIf you insert a new battery or after the removal and reinsertion of the battery, it is possiblethat the display of the capacity is not correct. To make it work correctly again, the batteryhas to be discharged and then charged completely. However, the calibration takes usually30 to 50 hours! During this time, you cannot work with your device. For this purpose, theActilino has to be connected to the included wall power supply to guarantee a steady powersource. The battery calibration can only be activated on the menu item “Battery calibration:see manual” by pressing the keys [SPC + 1 4 7] (Chord C). First you will read "(O)ptions"and a few seconds later "charge, USB on". Then the battery will be charged, dischargedand then charged again completely. While discharging, the Actilino works with minimumpower consumption. During the process the Braille pins will be set and reset in quicksuccession. At the end of the calibration process, the Braille display shows:" aa:bb e:ff g,gV", in which a,b,f and g stand for numbers.The calibration of the battery can be interrupted by pressing the cursor routing keys CR16,CR15, CR16, CR15 one after another. The display of the capacity will still not be correct.The battery charging state depends on the time of the interruption.5.1.12.22 (R)estore factory defaultsBy pressing the [TRC] key over this item, you can restore factory defaults for all options.Actilino will prompt you whether you are sure to proceed.The default settings are as follows:(6) dots braille: offhotkeys (A)ctivate objects: off(H)ighlight hotkeys: offshow s(Y)stem files: offshow f(O)lders first: on(Q)uick entry: onshow file attri(B)utes: offauto switch e(X)t keyboard: onsW(i)tch Actilino auto off: off(S)tartup mode: (M)ain menu(T)one signals: on to all(D)ate and time format: 12-hours and English Dates: on(I)nput indication: offdot (F)irmness: (M)iddle